Latch and lock mechanism



May 28, 1968 l.. D. wlNGx-:R y 3,385,622

LATC AND LOCK MECHANISM Filed May 16, 1966 f 2 Sheets-Sheet 1 38 44 FIGJ3S 45 39 2O 56 57 45 41 F|G.2 4o 35 x x x INVENTOR. LORIN D.WINGER F|G.e 75 75 FIG 7 BY# 74 l 4 74 cdi/2id s A ATTORNEY May 28, 1968 l.. D. WINGr-:R 3,385,622

LATCH AND LOCK MECHANISM Filed May 16, 1966 2 Sheets-Sheet 2 @l r/92,9| 69 l 4 86 u |22 i j 93 O01 99 l 0,2 |05 98 f. A P., Il 1NvENToR.- /uq h Nvu 24 'I LQRlN D WINGER "Y Jmdc.

'sus FIGAJS o '27 5 AT ToRNl-:Y

United States Patent O 3,385,622 LATCH AND LCK MECHANISM Lorin D. Winger, Everett, Wash. (5907 California Ave. SW., Seattle, Wash. 98116) Filed May 16, 1966, ser. Nu. 559,343 2 Claims. (Cl. 292-170) ABSTRACT GF THE DISCLOSURE A large tubular knob shank housing extends crosswise through \a door, a smaller tubular bolt housing having a bolt in it extends inwardly from an edge of the door and crosswise through holes in the knob shank housing. A longitudinally movable knob shank having a knob on each end extends lengthwise through the knob shank housing and crosswise through holes in the bolt housing and carries devices which will retract the bolt when the knob shank is moved lengthwise in the direction the door must be moved to open it.

My invention relates to improvements in latch and lock mechanism.

Conventional lock and latch mechanism, as ordinarily used on doors makes it necessary for a person to perform two distinct acts in opening the door, the iirst being the turning `of a knob or pressing of a lever .or similar operation to release the bolt and the second being the exertion of Aa push or pull to open the door.

An object of my invention is to simplify the opening of a latched door by making it possible to open the same by merely exerting a push or pull on the knob or handle of the same.

Another object is to provide latch and lock mechanism having -a bolt by which a door is held closed and having bolt operating means by which said bolt can be retracted by a substantially straight push or pull applied in the direction of opening movement of the door to a knob or handle by which the door is opened and closed.

Another object is to provide ya latch and lock mechanism which can be installed in a door by boring two intersecting holes in the door and without requiring any mortising of the door.

Other objects are to provide a latch and lock mechanism of simple and inexpensive construction which can be easily and quickly installed in a door and is reliable and elicient in its operation.

Other objects will be lapparent from the following description and accompanying drawings.

FIGURE l is a horizontal sectional view of my latch and lock mechanism showing the same installed in a door, a fragment .of the door being shown in a closed position with a bolt in latched engagement with a door jamb.

FIG. 2 is a fragmentary sectional view taken substantially on broken line 2 2 of FIG. l, parts being shown in elevation.

FIG. 3 is a fragmentary sectional view taken substantially on broken line 3-3 of FIG. l, parts being shown in elevation.

FIG. 4 is a detached fragmentary elevational View of a tubular knob shank housing shown in FIGS. l to 3.

FIG. 5 is a detached fragmentary elevational view of a tubular b'olt housing.

FIG. 6 is a detached fragmentary elevational view of a tubular knob shank.

FIG. 7 is a fragmentary view, partly in section and partly in plan, of knob shank locking means of modified form.

FIG. 8 is a vertical sectional view, with parts in elevation, showing a modied form of my invention in which handles are used instead of knobs.

FIG. 9 is a view, partly in section and partly in plan, taken substantially on broken line 9-9 of FIG. 8.

FIG. 10 is a horizontal sectional view of latch and lock means similar to those shown in FIGS. l to 7 but which uses a ilat tube as ya knob shank housing and a tiat bar as a push and pull type knob shank.

FIG. 11 is a sectional view, with parts in elevation, taken substantially on broken line 11-11 of FIG. 10.

FIG. 12 is a sectional view, with parts in elevation, taken substantially on broken line 12-12 of FIG. l0.

FIG. 13 is a detached perspective view of a flat guide tube or housing for a hat knob shank of the type used in FIGS. l0 to l2.

FIG. 14 is a detached perspective View of said flat knob shank.

FIG. 15 is a fragmentary sectional view, with parts in plan, showing |a latch bolt movably supported in a door jamb and latch bolt push-back means carried by a door and operating in accordance with my invention to release said latch bolt.

FIG. 16 is a fragmentary sectional view, partly in elevation, taken substantially on broken line 16-16 of FIG. 15.

The form of invention shown in FIGS. l to 6 includes a tubular knob shank housing 18 which extends transversely through a suitable bore 19 in a door 20. A tubular knob shank 21, of smaller diameter than the housing 18 extends coaxially through the housing 18 and has two knobs 22 and 23, preferably of flat disc like shape, attached to its respective ends. In the illustrative embodiment herein shown the knob 23 is an outside knob and the knob 22 an inside knob. The knob 22 is welded or otherwise rigidly attached to the shank 21. The knob 23 has a short axially disposed tube 24, of smaller diameter than the shank 21, welded or otherwise rigidly attached to it and protruding perpendicularly therefrom. The short tube 24 ts telescopically within an end portion of the shank 21 and one or more somewhat resilient, outwardly displaced barbs or pawls 25 of said tube 24 lit within perforations 26 in the shank 21 and secure the two parts 21 and 24 together in `assembled relation. The barbs 25 `and perforations 26 provide for easy assembly of the knob shank 21 and tube 24 through housing 18 and said parts 21 and 24 can be dis-assembled by pressing the barbs -25 inwardly. The end portion of housing `13 which protrudes from the side of the door 20 adjacent outer knob 23 is externally threaded andan internally threaded anged fitting 27 is provided for threaded engagement with said housing tlg and can be secured to the door 20 by screws 28. The outer end portion of the housing 18 is inwardly bent to provide a part 2-9 which makes close contact with the knob shank 21.

The end portion of the housing l18 adjacent the inner knob 22 protrudes from the door 20 and has a rigidly attached door plate or flange 30 which engages with the door. An inwardly bent part 31 on the inner end of housing 18 provides slidable engagement with the knob shank 21 and serves as means with which a locking member may engage, as hereinafter explained. A relatively short tube 32 of slightly larger diameter than the housing 18 is rigidly attached to the inner face of the inside knob 22 and tits telescopically over the housing 18. A compression spring 33 is provided within the space between the short tube 32 and knob shank 21 and yieldingly urges the assembly, which includes knob shank 20 and knobs 22 and 23, into the position shown in FIG. 1.

A bore 34 extends from the front edge of the door 20 inwardly and intersects the transverse bore 19 with the axes of the two bores disposed in a common plane at right angles to the length of the door. A tubular bolt housing 35, of smaller diameter than the knob shank housing 18, is disposed within the bore 34 and extends through a suitable opening 36 in said knob shank housing 18. The inner end portion of the bolt housing has aligned transverse openings 37, FIG. 5, and the knob shank 21 extends through said openings 37. A face plate 39 is rigid with the outer end of the bolt housing 35 and is secured to the edge of the door 20.

A bolt comprising two parts 40 and 41 is reciprocable in the bolt housing 35. The bolt part 40 is of flat metal and has a downwardly bent outer end 42 to which the bolt part 41 is rigidly secured. Said bolt part 41 is beveled on one side making it of conventional latch bolt shape. Said bolt part 41 is guided in the face plate 39 and in a guide `member 43 which is rigid with the face plate 39 and bolt housing 35. The bolt part 41 engages in the usual manner with a strike plate 44 on a door jamb 45 which carries a door stop 46.

The inner end portion of the bolt part 40 passes through two transversely aligned elongated openings 47, see also FIG. 6, in the tubular knob shank 21. Preferably the inner end of the bolt part 40 is guided in a suitable opening in an end part 49 of the -bolt housing 35 and a stop pin 50 extends through it and limits outward movement of the bolt 40, 41.

Devices are provided for utilizing longitudinal movement of the tubular knob shank 21 in one direction to retract the bolt 40, 41. Movement of shank 21 in an opposite direction is limited by collar 38. The devices shown in FIGS. l, 2 and 3 for doing this comprise a cam roller 51 secured to a bearing pin 52 which is journaled in a bearing tube 53. Tube 53 is rigid with the bolt part 40 and extends downwardly therefrom. The roller 51 is adapted to be engaged by an inclined surface 54 of a cam 55 which is rigid with the knob shank 21. Obviously the bearing pin 52 can be rigid with the bolt part 40 and the cam roller 51 can be rotatable on said pin 52. The use of a cam roller provides rolling contact and contributes to ease of operation but it will be understood that the cam surface 54 will retract the bolt 40, 41 if it is caused to react against a non-rotatable member which is rigid with the bolt part 40.

A compression spring 56 is provided between the end portion 42 of bolt part 40 and a spring support member 57 which is rigid with the bolt housing 35. Spring 56 urges the bolt 40, 41 into the latched position in which it is shown in FIGS. 1, 2 and 3.

In installing the latch of FIGS. 1 to 6, the two intersecting holes 19 and 34 are bored in the door; the knob shank housing 18 is then inserted and the flanged fitting 27 applied and tightened against the door to hold said housing 18 immovable; the latch 'bolt housing 35, with the latch bolt 40, 41 and spring 56 and spring support 57 is then inserted in the bore 34 and extends through the openings 36 in the housing 18; then, with the spring 33 in the shell 32, the knob shank 21, which has slots 47 to provide clearance for bolt part 40, is inserted lengthwise through the housing 18 and through the transverse holes 36 in the latch bolt housing 35. The outside knob 23 with its rigidly attached tube 24 is then applied and the barbs 25 caused to snap into the perforations 26 to complete the assembly.

When this device is operating as a latch if a person approaches the door from the side toward which it swings in opening, which would be the side bearing the knob 23, all he needs to do is pull on the knob 23 and this pull will retract the bolt and open the door. If he approaches the door from the side opposite the direction in which it swings in opening, namely the side on which the knob 22 is disposed, a push on said knob 22 will retract the bolt and open the door.

Preferably devices are provided in connection with the inside knob 22 to lock the shank 21 against endwise movement by a pull exerted on the outside knob 23. This makes it possible to lock the door so it can not be opened `from the outside ybut does not prevent retractile movement of the bolt 40, 41 by engagement with the strike plate 44 in closing the door. One set of devices which thus lock the knob shank 21 is shown in FIG. 1 and comprises a pin 59 rotatively supported by the inner knob 22. The pin 59 has a preferably llat finger piece 60 on its outer end by which it may be turned and has, on its inner end a cam 61 which engages with a at spring 62 that carries a normally retracted locking pawl 63. The pawl 63 can be moved outwardly through a perforation 64 in the shank 21 from an unlocked to a locked position relative to an inturned end 31 of housing 18 by turning the pin 59. The spring 62 is secured to the shank 21.

The modiiied locking means shown in FIG. 7 comprises a pawl 63 and spring 62' which operate similarly to those just described. A longitudinally movable pin 59 supported by an inner knob 22 engages with the spring 62', and when pushed inwardly, will move the pawl 63 from an unlocked to a locked position. An inwardly bent resilient end portion 65 of spring 62 engages within spaced apart detent grooves 66 and 67 in the pin 59 and yieldingly holds said pin in its unlocked and locked positions respectively.

FIGS. 8 and 9 show an embodiment of my invention in which an outside handle 70 and an inside handle 71 are provided on a door 72 for operating latch and lock mechanism which is similar in construction and mode of operation to that just hereinbefore described. The lower end portion of each handle 70 and 71 is forked and has an upwardly extending notch 73 which fits over an annularly grooved end part of a cross pin 75 that extends through the door 72. A washer 76 may be provided on each end portion of pin 75 between the forked lower end part of each handle and the door. The upper end portions of the two handles 70 and 71 are connected respectively by pivots 77 and 78 with the opposite ends of a push-pull type shank 79. The shank 79 extends transversely through the door 72 and through transverse openings 80 in a tubular `bolt housing 81 and through flanged door plates 82. The plates 82 can be circular and they are secured to the door 72 and serve as guide and bearing members to slidably support the shank 79 and as stops for engagement by lugs 83 on the handles 70 and 71.

The bolt housing 81 is similar to the previously described bolt housing 35 and it has therein a `bolt 40', 41', which is similar to the bolt 40, 41 and is mounted and guided in a similar manner and is urged outwardly by a spring 56. A lug 84 is secured to the bolt part 40' above the shank 79 and extends downwardly from said bolt part 40' into the path of movement of an inclined cam face 54' which is shown to be integral with shank 79 but can be attached to said shank.

The spring 56 yieldingly urges the bolt 40', 41 into an outwardly protruding position, and in so doing, causes the lug 84 to press against the cam surface 54 and yieldingly hold the two door handles in the position in which they are shown in FIG. 8. Obviously if the door 72 is closed and latched a pull exerted on the outer handle 70 or a pressure exerted on the inner handle 71 will retract the latch bolt 40', 41 and open the door. A locking pin 69 guided in a mounting member 69 can be moved longitudinally into and out of a recess 68 in the shank 79. This enables a person on the inside of the door to lock the shank 79 so that, when the door is in a closed position, the bolt 40', 41 can not be retracted and the door opened by a person on the outside.

The latch and lock disclosed in FIGS. 10 to 14 comprises a llat tubular knob shank housing 85 extending crosswise through a door 86 and secured to said door by angle brackets 87. A flat knob shank 89 extends through and is supported and guided by said housing 85. An outer knob 9) and an inner -knob 91 are secured to the respective ends of said knob shank by angle brackets 92. The top wall of the knob shank housing 85 is cut away, as best shown in FIG. 13, to provide clearance for a cam 93 which is secured to the knob shank 89. The cam 93 has an inclined surface 94 positioned to engage with a roller 95 on a shaft 96 supported in a bearing tube 97. The tube 97 is rigid with a bolt which is made up of three parts 98, 99 and 100. The inner end of bolt part 98 is guided in an end part 101 of a housing 102. The housing 102 is similar to previously described bolt housing 35.

Locking means, which is accessible only from the inside of the door, is provided to lock the bolt part 98 against inward movement by the cam 93 and thus lock the door 86 against entrance from the outside when it is closed. As illustrative of one means for doing this I show, in FIG. 12, a locking pin 103 supported in a sleeve 104 and longitudinally movable between the retracted position, in which it is shown, and a position in which it extends back of the bearing tube 97 and will block retractile movement of the bolt part 98. A spring 107 yieldingly urges the bolt part 100 outwardly. To prevent the pin 103 from blocking retraction of the bolt parts 99 and 100 when said pin 103 is in a locking position and said bolt part 100 engages a strike plate 104 as the door is being moved toward a closed position, I provide for telescopically shortening the bolt. One way to do this is to bend edge portions of the bolt part`99 downwardly and inwardly as indicated by 105, thereby forming tracks which telescopically receive the edge portions of the bolt part 98. Stop lugs 106 are provided on the outer end of lock part 98 to contact the ends of the track-forming edge portions 105 of bolt part 99 and limit elongation of the two parts 98 and 99.

The latch and lock shown in FIGS. to 14 operates in substantially the same manner as the previously described latch and lock shown in FIGS. 1 to 7.

FIG. discloses a modified form of my invention in which a latch bolt 110 is longitudinally movable in a flanged guide tube 111 which is supported in a door jamb 112. A spring 113 urges the bolt 110 outwardly and stop shoulders 114 on the inner end of the bolt limit its outward movement. The bolt 110 is adapted to protrude into and engage with a face or strike plate 115 on a door 116 to hold said door closed and knob or handle operated devices similar to those previously described herein are provided in the door 116 to push the bolt 110 outwardly into an unlocked position. These knob or handle operated devices include a bolt push-back member 117 in a tubular housing 118 in the door. The push-back member 117 is guided for longitudinal movement in a guide plate 119 and an end part 120 of the housing 118 and it has a downwardly extending end member 121 similar to part 42 of FIG. 2 to contact the bolt 110. Two tabs 122 on the guide plate 119 limit inward movement of the push-back member 117 and a stop pin 123 in the inner end of said member 117 limits outward movement thereof. A tension spring 124 connected between the end member 121 and a tab 125 of housing 118 yieldingly urges push-back -member 117 into a retracted position.

A roller 126, similar to rollers 51 and 95, is carried by push-back member 117 and is positioned to be engaged by a cam 127 on a knob shank 128. The shank 128 is similar to shank 89 and is similarly guided in housing 129. The spring 124 normally holds the push-back member 117 and shank 118 in the retracted position shown in FIG. 15. Movement of shank 128 and cam 127 toward the roller 126 will move push-back member 117 outwardly and this will move the bolt 110 into an unlatched position. Spring 124 will return the parts 117 and 122 to the position in which they are shown in FIG. 15 as soon as they are released. Obviously locking means similar to those hereinbefore described can be provided to lock either the push-bac-k member 117 or the shank 128 so they can not be moved and the door opened from the outside when it is closed. Also it will be obvious that the devices for locking the bolts and thc knob or handle Shanks in the torms of my invention 4disclosed in FIGS. l to 14 can be omitted if desired.

The foregoing description and accompanying drawings clearly disclose preferred embodiments of my invention but it will be understood that changes in the same may be made within the scope of the following claims.

I claim:

1. In latch and lock mechanism the combination with a door supported for swinging movement in a predetermined direction from a closed position toward an open position, of a tubular knob shank housing extending transversely through said door adjacent the front edge of the door, both ends of said knob shank housing having inwardly bent end parts forming bearing means, a tubular bolt housing of smaller diameter than said knob shank housing extending from the front edge of said door into said door and transversely through said knob shank housing; a tubular knob shank of smaller diameter than said bolt housing disposed coaXially of said knob shank housing and supported for longitudinal movement by said knob shank housing and extending transversely through said bolt housing; an inside knob rigidly attached to one end of said knob shank; a short tube of slightly larger diameter than said knob shank housing rigid with and protruding from said inside knob and fitting telescopically and slidably over said knob shank housing; a compression spring on said knob shank within said short tube between said inside knob and the adjacent inwardly bent end part of said knob shank housing urging said Iknob shank and knob in the direction of closing movement of the door; stop means on the knob shank limiting movement of the knob shank by said spring; an outside knob; another short tube of smaller diameter than said knob shank rigidly secured to and protruding from said outside knob and iitting telescopically within said knob shank; releasable means securing said other short tube to said knob shank; a bolt supported for longitudinal movement in said bolt housing between a retracted position and a locking position in which it protrudes from the front edge of said door; resilient means yieldingly urging said bolt outwardly; and bolt retracting devices interposed between said bolt and said knob shank operable to move said bolt into a retracted position in response to longitudinal movement of said shank in the direction of opening movement of the door.

2. The apparatus as claimed in claim 1 in which a spring retracted locking pawl is disposed within the knob shank adjacent the inner knob, is movable longitudinally with the knob shank, and is positioned to lock against the adjacent inturned end part of the knob shank housing, the knob shank having an opening through which said pawl operates; and in which locking pawl operating means carried by the inside knob is operable in moving said locking pawl from a retracted to a locking position in which it locks the knob shank against longitudinal movement in the direction oi opening movement of the door.

References Cited UNITED STATES PATENTS 1,769,288 7/1930 Godfried et al. 292-170 2,121,531 6/1938 Murphy 292-337 2,383,574 8/1945 Voight 292-170 2,521,111 9/1950 Ylinen 292-170 X FOREIGN PATENTS 664,451 1/ 1952 Great Britain.

MARVIN A. CHAMPION, Primary Examiner.

J. R. MOSES, Assistant Examiner. 

